/*
    Copyright (c) 2013 Ariba, Inc.
    All rights reserved. Patents pending.

    $Id: //ariba/platform/util/expr/ariba/util/expr/ASTNot.java#3 $
 */
//--------------------------------------------------------------------------
//  Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//  Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//  Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//  Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
//  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
//  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
//  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//--------------------------------------------------------------------------
package ariba.util.expr;

/**
 * @author Luke Blanshard (blanshlu@netscape.net)
 * @author Drew Davidson (drew@ognl.org)
 */
class ASTNot extends ExpressionNode
{
    public ASTNot (int id)
    {
        super(id);
    }

    public ASTNot (ExprParser p, int id)
    {
        super(p, id);
    }

    protected Object getValueBody (ExprContext context, Object source)
    throws ExprException
    {
        final boolean result
        = !ExprOps.booleanValue(children[0].getValue(context, source));

        return Boolean.valueOf(result);
    }

    public String getExpressionOperator (int index)
    {
        return "!";
    }

    @Override
    public String toString ()
    {
        return "!" + children[0];
    }

    public int getExpressionType ()
    {
        return ExpressionNode.LogicalExpression;
    }
}
